Fibre Laser
- Thread starter lilow
- Start date
I started converting the machine built that is able to scan an arm holding 0.5mm height.
In looking into the equation with the G3, the scenario had to change.
As I want to only change the S / D signals, not the output of the comparator.
I have gone back to a dual comparator board, one section for the game board the other for the G3.
(both set to the same values)
Have tested this before on the 3D Tig.
Lets see how it goes.
Cheers.
In looking into the equation with the G3, the scenario had to change.
As I want to only change the S / D signals, not the output of the comparator.
I have gone back to a dual comparator board, one section for the game board the other for the G3.
(both set to the same values)
Have tested this before on the 3D Tig.
Lets see how it goes.
Cheers.
I mentioned a while back I was putting together a dual height control system, I have already tested the operation.
I am certainly not sure yet, but a stepper working with a Gecko 540 and a game control seems to work better than the G3 with a stepper or an AC servo, (note - this is only with the Laser compacitive sensor voltage)
I cannot clarify this until the control systems are put together.
So, the dual comparator has been assembled using the opto's out of an early G3.
As I am away from the workshop, it's got to wait for the installation sometime late next week.
Cheers.
I am certainly not sure yet, but a stepper working with a Gecko 540 and a game control seems to work better than the G3 with a stepper or an AC servo, (note - this is only with the Laser compacitive sensor voltage)
I cannot clarify this until the control systems are put together.
So, the dual comparator has been assembled using the opto's out of an early G3.
As I am away from the workshop, it's got to wait for the installation sometime late next week.
Cheers.
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Now back from an interesting trip.
While away I set up a DT121 dual comparator board.
In doing this I realised there is no need for the Arc Okay, this represents the top two channels of the DT115.
So the remedy was to eliminate the Arc Okay from the board.
By working a few things, a dual height control has evolved.
So now have a dual THC running off a board originally designed for one operation.
When removing the cover off the control that was able to scan arms, this was a plug in board built.
So now there are small boards being built for conversation between the Masso G3 and the original game boy controller.
Photos below.
Now this increase in views is a concern.
If others want to contact me, do it.
There are too many views, compared to controllers sold.
Cheers.
While away I set up a DT121 dual comparator board.
In doing this I realised there is no need for the Arc Okay, this represents the top two channels of the DT115.
So the remedy was to eliminate the Arc Okay from the board.
By working a few things, a dual height control has evolved.
So now have a dual THC running off a board originally designed for one operation.
When removing the cover off the control that was able to scan arms, this was a plug in board built.
So now there are small boards being built for conversation between the Masso G3 and the original game boy controller.
Photos below.
Now this increase in views is a concern.
If others want to contact me, do it.
There are too many views, compared to controllers sold.
Cheers.
The DT115 has been split into two height controls, now working executing this area of two axis's.
Whatever can be used always needs to be re-formatted.
The Arduino board had no contact between some terminals, so had to fit cross wires.
All nearly ready to cross reference between the two controls, but need a new game boy control, the black one at the top.
It's amazing that the G3 torch touch off works as a breakaway when in motion (a full stop of the machine).
Cheers.
Got to build an enclosure for the extra voltmeter and pot.
Whatever can be used always needs to be re-formatted.
The Arduino board had no contact between some terminals, so had to fit cross wires.
All nearly ready to cross reference between the two controls, but need a new game boy control, the black one at the top.
It's amazing that the G3 torch touch off works as a breakaway when in motion (a full stop of the machine).
Cheers.
Got to build an enclosure for the extra voltmeter and pot.
Okay got the dual height control module into the DT115 and working.
It works exactly as it did with the original testing / scanning operation back in 2021.
It is instantaneous with reactions, with the threshold of an original setting of 0.0004v.
It is showing the movement with game boy module with accurate movement, the switching signal is even being picked up in the F1 screen.
Two different voltages were set, the green voltmeter is the Ocean Controls module, the other blue one is for the G3.
A short video of the operation is below.
Hopefully get to run a file tomorrow and capture the F1 screen working.
Cheers.
It works exactly as it did with the original testing / scanning operation back in 2021.
It is instantaneous with reactions, with the threshold of an original setting of 0.0004v.
It is showing the movement with game boy module with accurate movement, the switching signal is even being picked up in the F1 screen.
Two different voltages were set, the green voltmeter is the Ocean Controls module, the other blue one is for the G3.
A short video of the operation is below.
Hopefully get to run a file tomorrow and capture the F1 screen working.
Cheers.
I think I have finally found the reason for the varied fluctuation of the Z axis in the Fibre 21.
After running the Ocean Controls SKU:KTA-276 yesterday, it seems the G3 may not be able to keep up with the triggering using the Capacitive voltage through the DT115, that is using the Opto's supplied in the controller.
By looking the switching Up/Down of the comparator compared to the reaction in the F1 screen, it doesn't correspond.
But that is not the real issue, compacitive field voltage is.
Any way it is working, just now to find a way trim the Fibre 21 - Z axis movement and bring it in line with the actual signals produced.
I do not think the conpacitive field voltage travels like a clean voltage, distant could be the downfall.
Cheers.
After running the Ocean Controls SKU:KTA-276 yesterday, it seems the G3 may not be able to keep up with the triggering using the Capacitive voltage through the DT115, that is using the Opto's supplied in the controller.
By looking the switching Up/Down of the comparator compared to the reaction in the F1 screen, it doesn't correspond.
But that is not the real issue, compacitive field voltage is.
Any way it is working, just now to find a way trim the Fibre 21 - Z axis movement and bring it in line with the actual signals produced.
I do not think the conpacitive field voltage travels like a clean voltage, distant could be the downfall.
Cheers.
After the testing with both the Gameboy control and the G3.
Set the two channel board up on the Gantry today.
Found a voltage convertor to step down 24v to 12v for the comparator.
This voltage is taken from the capacitive sensing head voltage.
Ran the signal wire to the new board as well as left it to the original control panel, the volt meter on the new has not enough digits.
Now able to see the real voltage on the original which reads to 0.0000v.
Now to connect up the original pot to adjust the voltage without going back to the gantry, (two pot adjustment).
Cheers.
Set the two channel board up on the Gantry today.
Found a voltage convertor to step down 24v to 12v for the comparator.
This voltage is taken from the capacitive sensing head voltage.
Ran the signal wire to the new board as well as left it to the original control panel, the volt meter on the new has not enough digits.
Now able to see the real voltage on the original which reads to 0.0000v.
Now to connect up the original pot to adjust the voltage without going back to the gantry, (two pot adjustment).
Cheers.
Just tested the DT119 two chanel board on the Fibre 21 with the mechanical relays still in position.
It works, but not as quick as the Opto board vesion.
But noticed the swing of the Z axis is not as great as it use to be.
This could be because the sensor lead was shortened.
This is good, will cut a board and fit the original Opto's from the G3 soon.
Maybe quicken things.
Cheers.
It works, but not as quick as the Opto board vesion.
But noticed the swing of the Z axis is not as great as it use to be.
This could be because the sensor lead was shortened.
This is good, will cut a board and fit the original Opto's from the G3 soon.
Maybe quicken things.
Cheers.
Still working on this, swapped the mechanical relays of the DT119 board for some of Masso's opto's.
As well as repositioning the comparator board.
This proved positive, reduceded the float of the Z axis by approx half.
As Masso's quickest opto's that are installed for the DTHC and spindle are (SFH615A-2), have found some quicker ones.
When they arrive, I will plug them in.
Until then I will start putting the roadster together, needed some 5mm plates cut for some engine mounts.
First time cutting the thicknes, what a great start.
Cheers.
As well as repositioning the comparator board.
This proved positive, reduceded the float of the Z axis by approx half.
As Masso's quickest opto's that are installed for the DTHC and spindle are (SFH615A-2), have found some quicker ones.
When they arrive, I will plug them in.
Until then I will start putting the roadster together, needed some 5mm plates cut for some engine mounts.
First time cutting the thicknes, what a great start.
Cheers.
zombieengineer
ZombieEngineer
If the "Special" was cut with the laser, then you are effectively showing off the accuracy of the fiber laser. (dotting the "i" is pretty damn impressive)
I doubt you could cut that fine with a plasma cutter.
I doubt you could cut that fine with a plasma cutter.
@zombieengineer
Thanks, all in all, it has worked out well.
The Plasma was good, but it couldn't do anything to this accuracy.
Those 5mm plates had no dross on the underneath side, put them straight into the white vinegar bath to de-scale them.
Cheers.
I have finally found the solution to stop the swing of the Z axis under THC control.
A short video of a multiple cutting in simulation, no laser on.
The first three movements were for cutting small holes, the last movement shows the exact movement I have been looking for.
If it wasn't for a voltage regulator failing again, the dial would move in reverse motion.
Going to redesign the opto board to use pots to drop the trigger voltage.
Cheers.
![IMG_4074[1].JPG](https://forums.masso.com.au/data/attachments/13/13179-8859b96dd97ecb712f552c5730335971.jpg "IMG_4074[1].JPG")
![IMG_4075[1].JPG](https://forums.masso.com.au/data/attachments/13/13180-c8ebca2405efc4dd6c523779f526ab4b.jpg "IMG_4075[1].JPG")
A short video of a multiple cutting in simulation, no laser on.
The first three movements were for cutting small holes, the last movement shows the exact movement I have been looking for.
If it wasn't for a voltage regulator failing again, the dial would move in reverse motion.
Going to redesign the opto board to use pots to drop the trigger voltage.
Cheers.
It happens, when you get involved into working with small boards that could make a difference.
A job comes in, now to pull some early Ford technology out and fit a stainless IFS I used to make.
Over the weekend I will have to build a quick test module for these boards.
4 more to build with differnt configurations.
Cheers.
A job comes in, now to pull some early Ford technology out and fit a stainless IFS I used to make.
Over the weekend I will have to build a quick test module for these boards.
4 more to build with differnt configurations.
Cheers.
segoman-designs
SegoMan DeSigns
Does your steel supplier offer P & O (Pickled & Oiled) Sheets? It gets de-scaled and oiled at the mill, the cost is cheaper than you can do it on site.
@segoman-designs
I have always used P&O for all the frame rails and products produced, as I don't manufacture these anymore, small brackets are cut and put in the bath overnight.
Cheers.
4 new drop in boards assembled and tested.
These boards are fitted with an adjustable 5K - 25 turn pot and 78L05 voltage regulator.
Two boards are fitted with the oiginal KQAH616D Photmos relays, the two boards in the video are fitted with the faster SFH617A-2 opto's, not used in the G3.
As the power is being pulled from the G3 rail on the input side into Pin 4, then returned from Pin 3 of the OPTO to the designated input of the G3.
Copy of the specs below ---
The Fastest 4-Pin Upgrades
It is always an interesting when working in this area, you have to learn and keep learning.
Now waiting for 2 new DT119 boards to arrive.
Cheers.
A photo of the boards below.
![IMG_4093[1].JPG](https://forums.masso.com.au/data/attachments/13/13200-4f5f696ede391d0032fb6e8867dcdd12.jpg "IMG_4093[1].JPG")
These boards are fitted with an adjustable 5K - 25 turn pot and 78L05 voltage regulator.
Two boards are fitted with the oiginal KQAH616D Photmos relays, the two boards in the video are fitted with the faster SFH617A-2 opto's, not used in the G3.
As the power is being pulled from the G3 rail on the input side into Pin 4, then returned from Pin 3 of the OPTO to the designated input of the G3.
Copy of the specs below ---
The Fastest 4-Pin Upgrades
| Part Number | Pin Count | Footprint | Typical Rise / Fall Time | Max Operating Temperature |
|---|---|---|---|---|
| SFH615A-2 (Your Current Part) | 4-Pin | DIP-4 | ~3.0 µs / 14 µs | 100°C |
| VO617A-2 | 4-Pin | DIP-4 | ~2.0 µs / 2.0 µs | 110°C |
| SFH617A-2 | 4-Pin | DIP-4 | ~2.0 µs / 2.0 µs | 110°C |
It is always an interesting when working in this area, you have to learn and keep learning.
Now waiting for 2 new DT119 boards to arrive.
Cheers.
A photo of the boards below.
zombieengineer
ZombieEngineer
To achieve fall times approaching 2 microseconds requires a 75 ohm load resistor on the output (the data sheet quotes RL=75 ohms @ 5V), specifically the larger the on current the quicker the device turns off. The more realistic number is to look at the "saturated turn off time" which is closer to 25 microseconds.
I prefer to use the photodiode of a 4N25 (6 pin device) and a BC547/BC557 (depending on the required output type) when I feel the need for speed. The xx615 & xx617 optocouplers are good for about 20 kHz, while the 4N25 with transistor can consistently reach 190 kHz switching rates. To put that into perspective, the 4N25 in photodiode mode can cycle twice as fast as the MASSO controller can generate motor steps (109 kHz from memory). For reference using the transistor output of a 4N25 is no better than the xx615/xx617.
Experimental project to implement Rigid Tapping
Just finished a long term project and think it is time to deal with the thorny issue of rigid tapping. At this point of time MASSO has yet to implement rigid tapping as other stuff has been deemed higher priority (including the release of the MASSO touch - it has been on their "Todo list" that...
forums.masso.com.au
@zombieengineerTo achieve fall times approaching 2 microseconds requires a 75 ohm load resistor on the output (the data sheet quotes RL=75 ohms @ 5V), specifically the larger the on current the quicker the device turns off. The more realistic number is to look at the "saturated turn off time" which is closer to 25 microseconds.
I prefer to use the photodiode of a 4N25 (6 pin device) and a BC547/BC557 (depending on the required output type) when I feel the need for speed. The xx615 & xx617 optocouplers are good for about 20 kHz, while the 4N25 with transistor can consistently reach 190 kHz switching rates. To put that into perspective, the 4N25 in photodiode mode can cycle twice as fast as the MASSO controller can generate motor steps (109 kHz from memory). For reference using the transistor output of a 4N25 is no better than the xx615/xx617.
Experimental project to implement Rigid Tapping
Just finished a long term project and think it is time to deal with the thorny issue of rigid tapping. At this point of time MASSO has yet to implement rigid tapping as other stuff has been deemed higher priority (including the release of the MASSO touch - it has been on their "Todo list" that...
Thanks for the input, your knowledge is way over the individual, it's good.
You are right with the fact the Masso won't keep up, I discovered this a while ago.
But nether the less, it may shove them into a new realm.
The new DT119 dual comparators arrived, the signal given hangs between changes, so back to the reliable DT115.
Set up another DT115, it triggers, so machined a cover mounting for when I fit it.
Cheers.
Fitted the new modified DT115 to the Y / Z today, sideplate off, another hole machined to suit the cover plate shown yesterday.
It's all working as it should or better.
Last week I fitted two types of volatge isolation boards, one worked and seemed to give incremental changes.
Some more are now in the country and should be able to trialed again shortly.
Cheers.
![IMG_4103[1].JPG](https://forums.masso.com.au/data/attachments/13/13204-99fe0432dd3429e079ce6f7b6d74edbc.jpg "IMG_4103[1].JPG")
It's all working as it should or better.
Last week I fitted two types of volatge isolation boards, one worked and seemed to give incremental changes.
Some more are now in the country and should be able to trialed again shortly.
Cheers.